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dex/storage/static.go

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package storage
import (
"errors"
"strings"
)
// Tests for this code are in the "memory" package, since this package doesn't
// define a concrete storage implementation.
// staticClientsStorage is a storage that only allow read-only actions on clients.
// All read actions return from the list of clients stored in memory, not the
// underlying
type staticClientsStorage struct {
Storage
// A read-only set of clients.
clients []Client
clientsByID map[string]Client
}
// WithStaticClients adds a read-only set of clients to the underlying storages.
func WithStaticClients(s Storage, staticClients []Client) Storage {
clientsByID := make(map[string]Client, len(staticClients))
for _, client := range staticClients {
clientsByID[client.ID] = client
}
return staticClientsStorage{s, staticClients, clientsByID}
}
func (s staticClientsStorage) GetClient(id string) (Client, error) {
if client, ok := s.clientsByID[id]; ok {
return client, nil
}
return s.Storage.GetClient(id)
}
func (s staticClientsStorage) isStatic(id string) bool {
_, ok := s.clientsByID[id]
return ok
}
func (s staticClientsStorage) ListClients() ([]Client, error) {
clients, err := s.Storage.ListClients()
if err != nil {
return nil, err
}
n := 0
for _, client := range clients {
// If a client in the backing storage has the same ID as a static client
// prefer the static client.
if !s.isStatic(client.ID) {
clients[n] = client
n++
}
}
return append(clients[:n], s.clients...), nil
}
func (s staticClientsStorage) CreateClient(c Client) error {
if s.isStatic(c.ID) {
return errors.New("static clients: read-only cannot create client")
}
return s.Storage.CreateClient(c)
}
func (s staticClientsStorage) DeleteClient(id string) error {
if s.isStatic(id) {
return errors.New("static clients: read-only cannot delete client")
}
return s.Storage.DeleteClient(id)
}
func (s staticClientsStorage) UpdateClient(id string, updater func(old Client) (Client, error)) error {
if s.isStatic(id) {
return errors.New("static clients: read-only cannot update client")
}
return s.Storage.UpdateClient(id, updater)
}
type staticPasswordsStorage struct {
Storage
// A read-only set of passwords.
passwords []Password
passwordsByEmail map[string]Password
}
// WithStaticPasswords returns a storage with a read-only set of passwords. Write actions,
// such as creating other passwords, will fail.
func WithStaticPasswords(s Storage, staticPasswords []Password) Storage {
passwordsByEmail := make(map[string]Password, len(staticPasswords))
for _, p := range staticPasswords {
p.Email = strings.ToLower(p.Email)
passwordsByEmail[p.Email] = p
}
return staticPasswordsStorage{s, staticPasswords, passwordsByEmail}
}
func (s staticPasswordsStorage) isStatic(email string) bool {
_, ok := s.passwordsByEmail[strings.ToLower(email)]
return ok
}
func (s staticPasswordsStorage) GetPassword(email string) (Password, error) {
// TODO(ericchiang): BLAH. We really need to figure out how to handle
// lower cased emails better.
email = strings.ToLower(email)
if password, ok := s.passwordsByEmail[email]; ok {
return password, nil
}
return s.Storage.GetPassword(email)
}
func (s staticPasswordsStorage) ListPasswords() ([]Password, error) {
passwords, err := s.Storage.ListPasswords()
if err != nil {
return nil, err
}
n := 0
for _, password := range passwords {
// If an entry has the same email as those provided in the static
// values, prefer the static value.
if !s.isStatic(password.Email) {
passwords[n] = password
n++
}
}
return append(passwords[:n], s.passwords...), nil
}
func (s staticPasswordsStorage) CreatePassword(p Password) error {
if s.isStatic(p.Email) {
return errors.New("static passwords: read-only cannot create password")
}
return s.Storage.CreatePassword(p)
}
func (s staticPasswordsStorage) DeletePassword(email string) error {
if s.isStatic(email) {
return errors.New("static passwords: read-only cannot delete password")
}
return s.Storage.DeletePassword(email)
}
func (s staticPasswordsStorage) UpdatePassword(email string, updater func(old Password) (Password, error)) error {
if s.isStatic(email) {
return errors.New("static passwords: read-only cannot update password")
}
return s.Storage.UpdatePassword(email, updater)
}